diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0ca88e66e4..3b6538e4b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1186,6 +1186,12 @@ get_data_destination(dest_data)
 list(APPEND tmp_vi "  LyX files dir:           ${CMAKE_INSTALL_PREFIX}/${dest_data}")
 string(REPLACE ";" "\\n" VERSION_INFO "${tmp_vi}")
 
+find_library(XCB_LIBRARY NAMES xcb)
+if (XCB_LIBRARY)
+  set(HAVE_LIBXCB 1 CACHE BOOL "" FORCE)
+else()
+  set(HAVE_LIBXCB 0 CACHE BOOL "" FORCE)
+endif()
 configure_file(${LYX_CMAKE_DIR}/config.h.cmake ${TOP_BINARY_DIR}/config.h)
 unset(opts)
 unset(tmp_vi)